CVE-2026-5438

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability Description

A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The server does not enforce limits on decompressed size and allocates memory based on attacker-controlled compression metadata. A specially crafted gzip payload can trigger excessive memory allocation and exhaust system memory.

Vulnerability Details

Published Date

April 09, 2026

Last Modified

April 15, 2026

CWE ID

CWE-770

Source

NVD

Vendor

orthanc-server

Product

orthanc

External References

https://kb.cert.org/vuls/id/536588
https://www.machinespirits.de/
https://www.orthanc-server.com/

CVE-2026-5438

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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